Oscillating valve.



J. W. DAVIS.

OSCILLATING VALVE.

APPLIOATION FILED JAN. 9, 1912.

1,030,167, l Patented June 18, 1912.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

JOHN w. DAvIs, or WHITEFISH, MONTANA, AssIGNOR or ONE-HALE` To CHARLESe. HALL, or wHITHrIsH, MONTANA.

OSCILLATING VALVE.

Specification of Letters Patent.

` Patented June 18, 1912.

Application led January 9, 1912. Serial No. 670,165.

To all whom it may concern;

Be it kno-wn that I, JOHN W. DAVIS, a citizen of t-he United States, anda resident of Whiteiish, in the county of Flathead and State of Montana,have invented a new and Improved Oscillating Valve, of which thefollowing is a full, clear, and exact de` scription.

This invention relates particularly to improved oscillating valves forlocomotives, and has for'an object the construction and arrangement ofimproved means for permitting the engine to run free when the valve isshut off.

Another object of the invention is the arrangement of an improved valvestructure which will automatically connect the intake ports and exhaustports of the cylinder when the steam is shut olf so that the Vpiston mayfreely move without creating anyback pressure.

In carrying out the objects of the invention, a housing is connected tothe cylinder so that the ports of the cylinder will regis ter withsimi-lar ports in the housing. Mounted in this housing is an oscillatingvalve member formedas a cylinder open at one end with the exhaust portsarranged to register at predetermined times with the ports of thecylinder. Connected with the valve member is an operating mandrel orshaft which is connected to the usual link block on the engine through alcrank and connecting rod, so that the valve1 member will oscillate inproper timed relationship to the other moving parts of the engine. Thisstructure permits the valve to remain stationary when the engine isdrifting provided thereversing lever is set on the balance or center.

. yA practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters' of reference indicate corresponding party in all theviews.

Figure' 1 is'a transverse vertical section through avalve formedaccording to the present invention, the same being taken on the line 1 1of Fig. 5; Fig. 2 is a section through Fig. 5" on the line 2 2, the samej being shown'in an enlarged scale g' Fig. 3 is a section through Fig. 2on the line 3 3; Fig. 4t is a similar section to Fig. 3, exceptl thatthe parts are shown in their inoperative positions assumed when theengine is drifting; and Fig. 5 is a longitudinal vertical sectionthrough Fig. 1, partially on the line 5 5.

Referring to the accompanying drawings by numerals,` 1 indicates acylinder in which the usual piston of a locomotive moves. The cylinder 1is provided with an exhaust port 2 and intake ports 3 and 4f. All ofthese ports register with similar ports 2, 3, and L1', in the housing 5of the valve.

Arranged in the housing 5 is a rotating valve member 6 which is mountedupon a mandrel or operating shaft 7, supported in bearings 8, 9, and 10.The bearing 8 is part of a spider 1 formed integral with the intake endof the housing 5; the bearing 9 is formed integral with the removableend plate or head 12 of the housing 5, While the bearing 10 is formedintegral with the bracket or projection 13 extending from the head 12.The head 12 is bolted or other- -wise rigidly secured to the housing 5,whereby the rotating valve member 6 may be applied and removed wheneverdesired. From Fig. 5 it will be seen that the bearings 9 and 10 arespaced apart for accommodating the enlargement 14 of a crank 15. Thecrank 15 is connected to the usual valveshifting rod of a locomotive sothat when the crank 15 is oscillated back and forth the valve member 6will be also oscillated and caused to allow steam to enter therespective ports 3 and 4, and to alternately exhaustout port 2. Theshaft 7 is rigidly keyed tothe valve member 6 at both ends of the valvemember for insuring a proper back `and forth movement of the vvalvemember. A spherical bearing member 16 is also keyed to the shaft 7 andadapted to bear against the hollowed out portion 17 formed in the head12. The spherical bearing member 16 is designed to press Vtightlyagainst the end 18 of the valve member 6, and to slidingly Contact withthe bottom of the socket 17.

From Fig. 5 it will be noted, however, that the spherical bearing member16 is made of such a size as to'provide an opening 19 in the end 18 andhead 12. A similar opening 20 is providedbetween a spider 21 and thespider 11 at thefintake end of the valve member 6.

The valve member 6 is made cylindrical in shape with the intake endformed as a spider 21, so as to permit steam to freely enter from a pipe22 as long as the throttle is open. In addition to the spaces 19 and 110can enter 2() at the ends of the valve member 6, a space'23 is providedaround the circiimference of the valve memberV 6 between the same andthe housing 5. Packing rings Q4 and 25 are provided for preventing steamfrom entering the opening 23 unless per initted to do so by bearingplates 27,28, 29,

30, 31, Vand 32. However, the ends of the valve member are in continuouscommunication with the steam within the valve mem ber so that the' valvemember is balanced and thus reduces the friction to a minimum. kThevalve member 6 is provided with ports 33 and 34 which supply live steamto the ports 3 and 4, and is also provided with a single comparativelylarge port .35 designed to alternatelyl exhaust ports 3 and 4. Thebearing plates 27 and QSVare arranged on each side of the port 33 andare designed to pressagainst the housing 5 when live steam is beingsupplied to the interior of the valve member 6. This is also true of theremaining bearing plates so that none ofthe steam the opening 23. Therespective 'bearing plates are held to the position shown in Fig 1 bypistons 36 connected with piston rods 37, which in turn are connectedwith an extension 38 formed preferably integral lwith the respectivebearing plates.

A guiding .slot is provided for the extension 38, and also a` guidingslot is provided for the bearing plate proper, whereby when live steamis pressing on the piston 36 the respective. bearing plates will bedepressed as shown in Figs. 1, 2, and 3. When the steam has been shutott' from the valve, a spring 39 associated with each of the pistons 36will act on the respective pistons and .upon a shoulder 40and raise thebearing plates to the position shown in Fig. 4. This will permit a freecommunication between both. the ports 3 and 4 and the exhaust port 2',so that when the engine is running free or kdrifting the piston in thecylinder l will not create any back pressure. Also it will be noted thatby reason of the fact thatv the crank 15 isipositioned opposite a pointmidway between ports 33 and 34, the valve mem'- ber 6 will beheldstationary if the reversing mechanism of the engine is placed on thebalance or4 center. The reversing mechanism of the engine-is designed tobe placed in this position whenever the Vengine is'drift- Y ing so thatthere will be no wear on thevalve.

By the arrangement of the ports described, ample openings are providedorthe free admission and exhaustion of theV steam as the valve may bemade of any desired length and the ports made .for substantially thefull length of the valve.

`Having thus 'j described my invention, I

claimas new and desire to secure by Letters Patent:

f ,i 1. In an oscillating valve, the combination with a cylinder andoperating means for the valve, of a valve structure formed with ahousing having ports registering with the ports of the cylinder, anoscillating valve member in said housing connected with said operatingmeans, said valve member being smaller than said housing and therebyproviding a space between the hous-u ing and the valve member, meansmounted on said oscillating valve member for making a tight joint oneach side of each of said ports when the steam pressure is applied,springs for-actuating said means for raising thes ame when the pressureAhas been re-` moved whereby all of said ports are in communicationthrough the space between said `30 valve structure and said housing.

'2. In an oscillating valve the combination with a cylinder andoperating means for the valve, of a valve structure formed with ahousing having ports registering with the 'g5 ports of said cylinder, anoscillating valve Vmember arranged in said housingl and spacedtherefrom, a radially movable plate y arranged on each side of eachofthe ports in said valve member, a spring for normally holdingV saidvalve member `out of contact with said ho-iising, and a pistonconstruction connected with each of said platesfor being actuated bypressure when the same has been turned on to said valve member whereby Ythere will be a tight joint on each side of each of said ports whenV thesteam pressure4 is applied and a passageway will be provided between allof said valvesV and all of said ports when said pressure has beenrelieved.

3. In a valve, a housing formed with a plurality otl intake ports and anexhaust port, a rotating valve member arranged in said housing portsdesigned to register `with said intake ports and an exhaust arranged toregister alternately with said intake ports, a bearing plate on eachside of each of the ports in said valve member normally held againstsaid housing by the steam pressure in the valve member, and means forautomatically raising the bearing plates from contact with said housingfor providing a path from both of said intake ports to said rstmentionedli exhaust port when the steam pressure is'relieved.

4. In an oscillating valve, the combina# tion with a cylinder, of aValve casing mounted on said cylinder formed with lports registeringwith the ports of thecylinder, a cylindrical valve member arranged insaid' casing formed with a pair of ports register- 4 ing with the intakeports of said cylinder n, and an exhaust port registering alternatelywith said intake ports and continuously with; the exhaust port, avbearing platearrangedl on each side of Veach of the ports in said" valvemember, means` connected with each I of said plates extending to aposition in 130 formed with a plurality of 16S communication with theinterior of said valve member for being operated by the pressure thereinfor holding said plates in a predetermined lowered position, and aspring for each of said plates for raising the plates when said pressurehas been removed.

5. In an oscillating valve, a housing formed with a plurality of intakeports and a single exhaust port, an oscillating cylindrical valve memberarranged in said housing and spaced from said housing for deining anannular opening, said valve member being formed with an exhaustpassageway and a pair of ports registering alternately with said intakeports, a bearing plate arranged on each side of each of the ports insaid valve member for preventing communication between said ports andsaid annular opening between the housing and the valve member, and aspring for each of said plates for retracting the plates, whereby all ofsaid intake ports and all of said exhaust portsare thrown into freecommunication.

6. An oscillating valve comprising a cylindrical oscillating valvemember formed with one end substantially open for receiving fluid underpressure, said valve member being formed with a pair, of outlet portsand an exhaust passageway, a bearing plate arranged on each side of eachof said ports ing said valve member and spaced therefrom plates beingpositioned in sockets formed in said valve member, a piston in freecommunication with the interior of said valve member connected with eachof said bearing plates whereby when a fluid under pressure is admittedto said valve member, said bearing said valve member and spacedtherefrom their retaining sockets, a housin surrounding said valvemember and spaced therefrom adapted to have said bearing plates pressedagainst the same, a spring for each of said bearing plates forretracting the bearing plates when the Huid pressure is shut on?, saidhousing being formed with a pair of intake ports and an exhaust port,said ports being in free communication through the annular space betweensaid housing and said valve member when said springs have retracted saidbearing plates.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOI-IN W. DAVIS.

. Witnesses J. T. LINDBE, H. T. SENAY.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

